The IBM 91H0351, known as the IBM Turboways 155 PCI Adapter, is a specialized network adapter designed to facilitate high-speed data transmission over ATM (Asynchronous Transfer Mode) networks. This adapter card is engineered to provide reliable and efficient connectivity solutions for enterprise networks, aligning with the demands of high-bandwidth applications such as multimedia, video conferencing, and complex data analytics. By leveraging ATM technology, the Turboways 155 PCI Adapter offers a dynamic and scalable approach to network communications, allowing for variable data rates and ensuring optimal use of network resources. It fits into PCI slots of compatible IBM servers and workstations, providing a seamless upgrade path for organizations looking to enhance their network infrastructure. The card supports various ATM service classes, including CBR (Constant Bit Rate) and VBR (Variable Bit Rate), enabling it to adapt to different traffic patterns and application requirements. With its advanced traffic management and QoS (Quality of Service) capabilities, the IBM 91H0351 ensures that critical data is prioritized and delivered efficiently across the network. This adapter is a testament to IBM’s commitment to providing robust and flexible networking solutions that support the complex needs of modern businesses.